Question

A=1/2h(a+b) solve for h

Answer 1

A=1/2h(a+b)

1/2 can be said as 0.5

so

A=0.5h(a+b)

0.5h is being multiplied with (a+b), taking this expression of left hand side gives

A/0.5(a+b)=h

OR

h=A/0.5(a+b)

This is the final answer